PISA
Retaining Wall Systems The choice of professional contractors
PRODUCT
DESCRIPTION & DIMENSIONS (H x W x D)
~ WEIGHT PER UNIT
5501
Light Vertical Straight Unit 150 x 200 x 220
9.5
5502
Light Vertical Tapered Unit 150 x 200 x 220
5131
No./ Lin M²
UNITS PER PALLET
33
5
132
9.0
33
5
132
Left Hand Corner 150 x 300 x 200
18.0
-
-
48 L/H & 48 R/H
5132
Right Hand Corner 150 x 300 x 200
18.0
-
-
48 L/H & 48 R/H
5440
440 Capping Unit 65 x 440 x 320
16.0
-
2.3
84
5103
200 Capping Unit (Check Availability) 65 x 200 x 230
5.3
-
5
270
CODE
No./M²
Advantages • Won’t rot like a wooden sleeper wall
• Virtually maintenance free
• No mortar required
• Ability to construct the wall yourself with no previous experience
• No pins needed • Self aligning • No concrete footing required • Ability to easily make steps. Internal and external to wall
• Flexible system won’t crack like a brick wall • Range of capping units to suit your job
Colour range
Autumn Gold
Ivory
Bluestone
Charlestone
Desert Sand
NOTE: These colours are an indication only, please contact your nearest distributor to view sample colours.
Corners External
Left
Curves
Steps
Concave Curve
Right
Convex Curve
• Use left and right cornerstones alternately Internal
1st Course
2nd Course
(and 3rd, 5th & 7th…) (and 4th, 6th & 8th…)
• Using straight PISA units you can create internal corners with the method detailed above.
• To create a convex curve use tapered units. Use Left tapered units on one course, right tapered units on the next, alternating up the wall. • To create a concave wall use straight units. • Minimum radius: 2400mm (Add 20mm to this for each course in the wall)
• Steps are easily created with Pisa by simply using standard units for risers and split face capping units for step treads. • You can create internal or external stairs to your wall. • Ask your Pisa salesperson for a Pisa Stair construction help sheet.
PISA Height Tables ÂŽ
Walls up to 600mm in height
Unreinforced retaining wall MAXIMUM HEIGHT ACHIEVABLE (mm)
Hollow Block
Footing Thickness (mm)
Footing Width (mm)
Footing Toe (mm)
200
600
250
600
The wall height shown above applies for average soil conditions (Friction Angle>20° and cohesion factor > 5kPa). There must be no surcharge (ie no applied load or backfill slope > 1:4)
Top Soil Undisturbed Soil Geo-textile Cloth
Distance to Footing Toe
Drainage layer of 12 mm angular clear stone
Compacted sand or mortar bed layer
Drain >90mm Footing Thickness
Compacted crushed Rock levelling footing Footing Width
Walls over one metre in height
(Engineer design required)
*Note: These tables are indicative only. All walls over 1000mm in height must be designed and certified by an engineer.
Geo-grid reinforced wall
No-fines concrete constructed wall No-fines concrete. Depth determined by table.
Top Soil
Top Soil
Distance to Footing Toe
Undisturbed Soil
Undisturbed Soil
Geo-textile Cloth
Geo-textile Cloth
Compacted select in fill area
Compacted sand or mortar bed layer
Perforated Drain >90mm
Compacted crushed Rock levelling footing
Footing Thickness Footing Width
Distance to Footing Toe
Geo-grid Compacted sand or mortar bed layer
No-fines Concrete
Drain >90mm
Compacted crushed Rock levelling footing
Footing Thickness
Footing Width
General Notes applicable to all above design tables: All retaining walls are designed to AS 4678 (Including Amendment 1), for Structure Classification 3. All designs are based on the method published by the Concrete Masonry Association of Australia. All retaining walls over 1500 are designed for a live load of 5 kPa. All retaining walls up to 1500 are designed for a live load of 2.5 kPa. If live loads above these values are expected, these designs will not be appropriate. All walls are designed using Coulumb formula, except 900mm and 700mm high gravity walls which are also designed using Rankine-Bell formula. Cohesion is difficult to predict, is variable, may change over time, and is dependant on the effectiveness of surface sealing, surface drainage and subsurface drainage. Consideration must also be given for shrink\swell action of clay soils.